解剖学和形态学
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听力与言语-语言病理学
行为科学
心脏和心血管系统
细胞和组织工程学
临床神经病学
危重症监护医学
牙科,口腔外科和医学
皮肤病学
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肠胃学和肝脏学
老人病学和老年医学
卫生保健科学和服务
血液学
免疫学
传染病
综合和补充性医学
医学伦理学
医学信息学
医学实验室技术
医学,全科和内科
医学,法律
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神经系统科学
护理
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产科医学和妇科医学
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整形外科学
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生理学
基本医疗保健
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泌尿学和肾脏学
病毒学
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心理学,临床
abstract::Proplastids and prolamellar bodies with tubular membranes were isolated from the dark grown primary leaves of bean seedlings (Phaseolus vulgaris L.). The combination of fluorescence microscopy and negative contrast electron microscopy provided the tentative identification of protochlorophyll holochrome as a constituen...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.11.1769
更新日期:1968-11-01 00:00:00
abstract::Increasing concentrations of K (20, 200, 2000 mum) in the nutrient solution depressed Ca content and concentration in barley plants growing in nutrient solutions of low Ca concentrations (250 and 2500 mum). Increasing K from 20 to 200 mum depressed Ca absorption more than increasing K from 200 to 2000 mum K.The strong...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.10.1717
更新日期:1968-10-01 00:00:00
abstract::All visible protoplasmic streaming in sections of various plant stems was reversibly stopped by 2,4-dinitrophenol (DNP). Sections contained epidermal, cortical, and fiber cell types. Cells treated with DNP retained their semipermeability as evidenced by their plasmolysis in sucrose solutions. Washing out the DNP resul...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.10.1648
更新日期:1968-10-01 00:00:00
abstract::The cell separation aspect of abscission is thought to involve the action of specific cell wall degrading enzymes. Enzymes represent synthesis which in turn is preceded by the synthesis of specific RNA molecules, and it follows that inhibition of either of these processes would also block abscission. Since abscission ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:
更新日期:1968-09-01 00:00:00
abstract::A simplified procedure (involving disruption in sorbitol-pyrophosphate mixtures) permits the separation of spinach chloroplasts which retain the ability to catalyze the photosynthetic assimilation of carbon dioxide and its associated oxygen evolution. ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.9.1415
更新日期:1968-09-01 00:00:00
abstract::From a study of the effects of Ca ions on the nodulation of subterranean clover in flowing culture solutions it is concluded that root infection or nodule initiation has a higher Ca requirement than either nodule development or host plant growth in the presence of fixed nitrogen.Increasing Ca concentration from 246 to...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.9.1362
更新日期:1968-09-01 00:00:00
abstract::The interaction between kinetin and naphthaleneacetic acid in the regulation of senescence of excised tissue of mature broccoli leaves has been used to examine the extent of synchrony between changes in chlorophyll, RNA, and protein. Kinetin increased the net uptake of (14)C-labeled orotic acid and leucine. Naphthalen...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.8.1271
更新日期:1968-08-01 00:00:00
abstract::The duckweed Spirodela oligorrhiza was grown in sterile nutrient solutions that contained 1 mm phosphate-(32)P at various specific activities. In solutions with activities higher than 2 muc per mumole per ml, plant growth was inhibited after a time, and the physical appearance of the plants was affected. The critical ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.8.1297
更新日期:1968-08-01 00:00:00
abstract::THE EFFECT OF SALINITY ON INCORPORATION OF AMINO ACIDS INTO ROOT TIP PROTEIN IS APPARENTLY OF DUAL NATURE: in presence of salts the uptake is depressed and the normal metabolic pathways are disturbed. If the roots were grown at high salt concentration, uptake and incorporation are affected even if they are carried out...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.7.1115
更新日期:1968-07-01 00:00:00
abstract::A direct method is described for measuring the pressure in secondary phloem sieve tubes of oak trees. One end of a 26-gauge stainless steel tube was shaped such that when it penetrated the outer bark and transected a few sieve elements, it was stopped by the xylem so that small openings in the end allowed phloem sap t...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.7.1042
更新日期:1968-07-01 00:00:00
abstract::Spraying a 16 meter tall stand of red pine (Pinus resinosa Ait.) with 10(-3)m phenylmercuric acetate in early June and again in mid-July resulted in the water use between June 1 and October 25 being reduced by almost 10%. It was demonstrated that this was caused by an increase in the leaf resistance with partial stoma...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.6.973
更新日期:1968-06-01 00:00:00
abstract::The effect of 21% O(2) and 3% O(2) on the CO(2) exchange of detached wheat leaves was measured in a closed system with an infrared carbon dioxide analyzer. Temperature was varied between 2 degrees and 43 degrees , CO(2) concentration between 0.000% and 0.050% and light intensity between 40 ft-c and 1000 ft-c. In most ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.6.902
更新日期:1968-06-01 00:00:00
abstract::A light-induced shrinkage of chloroplasts in vivo could be detected with chloroplasts isolated within 2 minutes of harvesting pea plants. As determined both by packed volume and Coulter counter, the mean volume of chloroplasts from plants in the dark was 39 mu(3), whereas it was 31 mu(3) for chloroplasts from plants i...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.5.781
更新日期:1968-05-01 00:00:00
abstract::Electron micrographs are presented which establish the identity of the components of the 3 major bands observed after sucrose density centrifugation of the crude particulate fraction from the endosperm of germinating castor bean seedlings. These are: mitochondria (density 1.19 g/cc), proplastids (density 1.23 g/cc) an...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.5.705
更新日期:1968-05-01 00:00:00
abstract::Adenine phosphoribosyltransferase activity was measured in extracts of soybean (Glycine max var. Acme) callus and of senescing barley leaves (Hordeum distichon c.v. Prior). The enzyme from soybean callus had Michaelis constants for adenine and 5-phosphoribosyl pyrophosphate of 1.5 and 7.5 mum respectively and was inhi...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.4.645
更新日期:1968-04-01 00:00:00
abstract::Rubidium-86 was applied to the terminal 5.0 mm region of intact roots for a 6 hour period. The plants were then harvested after 0, 18, 24, 48, 72, or 96 hours additional growth in a rubidium-free continuously renewed nutrient solution. A substantial portion of the rubidium absorbed in a region of the root devoid of fu...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.4.583
更新日期:1968-04-01 00:00:00
abstract::Rates of photosynthesis, respiration, and transpiration of Monterey pine (Pinus radiata D. Don) were measured under controlled conditions of soil water suction and soil temperature. Air temperature, relative humidity, light intensity, and air movement were maintained constant. Rates of net photosynthesis, respiration,...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.4.515
更新日期:1968-04-01 00:00:00
abstract::Respiratory control ratios between 2.0 and 9.0 were obtained by comparison of the respiratory rates of cabbage mitochondria in the presence and in the absence of individual components of the system used to provide ADP and by comparing the rates before and after exhaustion of added ADP. These results indicate that resp...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.3.327
更新日期:1968-03-01 00:00:00
abstract::The major fatty acids (16 and 18 carbons) in leaves, flowers, and seeds of Nicotiana tabacum L. cv. Catterton have been analyzed at various intervals during the growth period. From the pattern of their accumulation and relative distribution, it was found that A) the amount of fatty acids in upper young leaves attained...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.3.428
更新日期:1968-03-01 00:00:00
abstract::Debladed midribs of citrus leaves showed the typical delay of abscission in response to indoleacetic acid (IAA), and the typical acceleration of abscission in response to gibberellic acid (GA). Interaction experiments with these 2 hormones indicated that the balance of the 2 hormones may be more important in regulatin...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.3.351
更新日期:1968-03-01 00:00:00
abstract::Pea seeds (Pisum sativum L. ;Alaska') with intact seedcoats (WC) and with seedcoats removed (WOC) were soaked in distilled water for 24 hours at 20 degrees . The water, containing the pea diffusate, was decanted after the second, fourth, sixth, eighth, twelfth, and twenty-fourth hour and analyzed for total nitrogen, a...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.2.255
更新日期:1968-02-01 00:00:00
abstract::It has been shown previously that an increase in ribulose diphosphate carboxylase activity occurs upon brief illumination of leaves of dark-grown Zea mays plants; an increase in ribose 5-phosphate isomerase occurs after prolonged illumination. Both of these responses to illumination are inhibited by chloramphenicol.Th...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.2.188
更新日期:1968-02-01 00:00:00
abstract::Absorption of selenate and selenite by excised roots of Astragalus Crotalariae, a selenium accumulator, and of A. lentiginosus, a non-accumulator, was favored by CaCl(2) and a pH of 4.0. The uptake of selenate and possibly selenite, is metabolically linked. Roots of a number of Astragalus species were examined, and in...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.1.14
更新日期:1968-01-01 00:00:00
abstract::Malformin and ethylene stimulate abscission of the primary leaves of Phaseolus aureus Roxb. in the dark, and abscission stimulation by both compounds is inhibited by indeleacetic acid and CO(2). Ethylene production by malformin-treated buds is stimulated within 4 hours. and up to 8 days, after treatment. Malformin-ind...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.43.1.76
更新日期:1968-01-01 00:00:00
abstract::A 2-step, 1-dimensional thin-layer chromatographic procedure for isolating indoleacetic acid (IAA) was developed and utilized in investigations of the biosynthesis of IAA from tryptophan-(14)C in cell-free extracts of pea (Pisum sativum L.) shoot tips. Identification of a (14)C-product as IAA was by (a) co-chromatogra...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.42.12.1787
更新日期:1967-12-01 00:00:00
abstract::The possibility that photosynthetic competence is gratuitous for light-induced chloroplast development in Euglena gracilis var. bacillaris was examined by incubating dark-grown resting cells in the light with DCMU, an inhibitor of photosynthesis. Under these conditions photosynthetic carbon dioxide fixation was inhibi...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.42.12.1716
更新日期:1967-12-01 00:00:00
abstract::The effects of representative respiratory inhibitors were investigated on the coupled respiration of mung bean mitochondria using succinate and l-malate as substrates. The inhibitors studied were: (I) malonate, (II) amytal and rotenone, (III) antimycin A and 2-n-nonyl-4-hydroxyquinoline N-oxide (NOQNO), and (IV) cyani...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.42.11.1535
更新日期:1967-11-01 00:00:00
abstract::The effects of factorial combinations of N, P and Mg on some of the interrelationships among nutrient ions as they occurred in seedlings of slash pine were investigated. In similar studies, true interactions have not always been differentiated from apparent interactions, the result of comparing foliage concentrations ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.42.11.1465
更新日期:1967-11-01 00:00:00
abstract::The analysis of substituent constants for the lipophilic and electronic factors in the auxin activity of substituted phenylacetic acids in elongation of coleoptile segments shows that these factors parallel those for the phenoxyacetic acids but assign reactivity in growth promotion to the meta position of phenylacetic...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.42.11.1519
更新日期:1967-11-01 00:00:00
abstract::The uptake of orthophosphate ((32)P) by excised corn roots, Zea mays L. was studied using roots grown on 0.2 mm CaSO(4). Nine concentrations of KH(2)PO(4) from 1 to 256 mum were used at temperatures of 20 degrees , 30 degrees , and 40 degrees . Enzyme kinetic analysis was applied to the data obtained. Two apparent mec...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.42.10.1407
更新日期:1967-10-01 00:00:00
abstract::A comparative study was made of the effects of auxin (alpha-naphthalene acetic acid), kinetin (6-furfurylaminopurine) and a mixture of auxin and kinetin applied in vivo on synthesis of RNA and protein and the distribution of such synthesis amongst the subcellular fractions of sections of endocarp from Kentucky Wonder ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.42.10.1334
更新日期:1967-10-01 00:00:00
abstract::A technique is described for detecting mutants of Chlamydomonas reinhardi that have impaired photosynthesis. It is based on the fact that when photosynthetic electron transport is blocked there may be an increase in the level of fluorescence similar to that obtained in the presence of an inhibitor of photosynthetic el...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.42.9.1284
更新日期:1967-09-01 00:00:00
abstract::The rates of utilization of exogenously supplied (14)C labeled acids by corn roots was compared to the utilization of these acids generated endogenously in the mitochondria from acetate-(3)H. (14)C-labeled citrate, pyruvate, succinate, glutamate or aspartate were supplied with acetate-(3)H in a 15 minute pulse and the...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.42.9.1197
更新日期:1967-09-01 00:00:00
abstract::Ethylene stimulated the incorporation of (32)P into RNA in the abscission zone of bean explants (Phaseolus vulgaris L. var. Red Kidney). The enhancement was observed in all fractions separated by methylated albumin kieselguhr column chromatography, although the magnitude of the increase was not the same for each fract...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.42.8.1094
更新日期:1967-08-01 00:00:00
abstract::Thermal conductivity coefficients have been determined for longitudinal and transverse flow in 4 varieties of fresh Citrus wood using steady state-methods. Equations were developed from which thermal conductivity could be rapidly estimated from moisture content or electrical conductivity. The heat balance of large and...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.42.8.1025
更新日期:1967-08-01 00:00:00
abstract::The isotope competition method with glucose-U-(14)C as a carbon source has been used to determine whether or not selected compounds contribute carbon to the biosynthesis of protein amino acids in cells derived from Paul's Scarlet Rose. Of 48 compounds tested, 15 contributed carbon to protein amino acids. The results s...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.42.7.941
更新日期:1967-07-01 00:00:00
abstract::Gibberellic acid (GA) enhances the synthesis of alpha-amylase and ribonuclease in isolated aleurone layers and this process is inhibited by abscisin. Removal of gibberellic acid in mid-course of alpha-amylase production results in a slowing down of alpha-amylase synthesis, suggesting a continued requirement of GA for ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.42.7.1008
更新日期:1967-07-01 00:00:00
abstract::Extracts of the tendrils of Pisum sativum, Var. Alaska, exhibit adenosine triphosphatase activity which is inversely proportional to the amount the tendrils have coiled. The specific viscosity of the extract decreases when ATP is added. This evidence indicates a possible role of a contractile adenosine triphosphatase ...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.42.6.845
更新日期:1967-06-01 00:00:00
abstract::The possible involvement of nucleic acid and protein synthesis in light-regulated chlorophyll formation by rapidly greening leaves has been studied.Removing leaves from illumination during the phase of rapid greening results in a reduction in the rate of pigment synthesis; cessation occurs within 2 to 4 hours. Etiolat...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.42.6.774
更新日期:1967-06-01 00:00:00
abstract::The kinetics of (14)CO(2) carboxylation and decarboxylation in corn root tips were determined to ascertain the sequence of product formation and subsequent utilization, and to obtain further evidence to predict the enzymes mediating the carboxylation and decarboxylations. The carboxylation data indicated that the firs...
journal_title:Plant physiology
pub_type: 杂志文章
doi:10.1104/pp.42.5.712
更新日期:1967-05-01 00:00:00